Inspiron (1564)

I have Dell Inspiron (1564) Windows 7 64-bit and I recently I formatted the hard drive so unfortunately I lost some data that Dell preinstalled on the computer. My question is, I used to have a caps lock and audio on screen indicators before the formatting but not anymore, also the realtek icon that used to appear every time I plug my headphones doesn’t appear anymore. What driver should I download from your website to get those back?